Identifiable Intangible Assets and Goodwill - Goodwill (Detail) $ in Millions	3 Months Ended
	Apr. 02, 2017 USD ($)
Goodwill [Roll Forward]
Balance, December 31, 2016	$ 54,449	[1]
Additions	71	[2]
Other	136	[3]
Balance, April 2, 2017	54,656	[1]
IH [Member]
Goodwill [Roll Forward]
Balance, December 31, 2016	30,134
Additions	3	[2]
Other	171	[3]
Balance, April 2, 2017	30,308
EH [Member]
Goodwill [Roll Forward]
Balance, December 31, 2016	24,315
Additions	68	[2]
Other	(35)	[3]
Balance, April 2, 2017	$ 24,348

[1] Amounts may not add due to rounding.

[2] EH additions primarily relate to our acquisition of AstraZeneca’s small molecule anti-infectives business and is subject to change until we complete the valuation of assets acquired and liabilities assumed from AstraZeneca (see Note 2A).

[3] Primarily reflects the impact of foreign exchange and an adjustment of our estimate of goodwill associated with the HIS net assets sold.